i guess they really screwed it all up with this patch. i cant create games and cant join "game doesnt exist" keeps appearing usually it went away after a while but now i have it for 3 days none stop. my brothers copy of the game says he is already connected 2 battel.net and wont let him connect with his cd key. cant recall battl.net was so broken before...

I've seen some improvements since Thursday. I can actually idle in a game for a full thirty minutes to an hour before being kicked off. I suspect it's the reroll kiddies and dupers are happier with their items now that the ladder has calmed down some and that a perfect Enigma is no longer going for 10,000 forum gold on a trading site because there's plenty of them.

Or maybe the issue doesn't lie on Blizzard's end but is instead on yours.

Here's a couple of links that you might find useful:

http://forums.battle.net/thread.html?topicId=10863439033&sid=3000
http://forums.battle.net/board.html?forumId=12014&sid=3000

And if you can't solve your issue through the stickies, then consider posting on that board or searching to see if anyone else has posted with similar issues.

simple solution: count to 3 between when you finish typing and when you hit create or join. works 95% of the time. if you hit enter immediately after, you will definitely fail.